KcetVector AlgebraKCET 2026MCQ+1 / -02026The value of $\lambda$ for which the vectors $\vec{a} = 2\hat{i} + \lambda\hat{j} + \hat{k}$ and $\vec{b} = \hat{i} + 2\hat{j} + 3\hat{k}$ are orthogonal isA$\dfrac{5}{2}$B$\dfrac{-5}{2}$C$\dfrac{2}{5}$D$\dfrac{-2}{5}$Check AnswerClear SelectionReveal AnswerShow Explanation
